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  1. Lustre
  2. LU-12587

DIO fallback to Buffer IO unexpectedly

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Details

    • Bug
    • Resolution: Unresolved
    • Minor
    • None
    • None
    • 3
    • 9223372036854775807

    Description

      It is possible that DirectIO might fallback to Buffer IO in some cases, but following
      DIO fallback to Buffer IO very easily:

      dd if=/dev/zero of=data bs=1M count=1
      dd iff=/dev/zero of=data bs=1M count=1 oflag=direct conv=notrunc

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          is related to

          Bug - A problem which impairs or prevents the functions of the product. LU-14541 Memory reclaim caused a stale data read

          • Critical - Crashes, loss of data, severe memory leak.
          • Resolved

          Bug - A problem which impairs or prevents the functions of the product. LU-15815 fast_read/stale data/reclaim workround causes SIGBUS

          • Critical - Crashes, loss of data, severe memory leak.
          • Resolved

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              paf0186 Patrick Farrell
              wshilong Wang Shilong (Inactive)
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              Dates

                Created:
                Updated: